Highly oxygen permeable rigid contact lenses from polyacetylenes

a technology of polyacetylene and contact lenses, which is applied in the field of contact lenses, can solve the problems of inability to achieve the desired molecular weight of polymer, and inability to achieve oxygen-transfer attempts

Inactive Publication Date: 2012-04-10
THE LAGADO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If contact lenses are worn, the atmospheric oxygen transfer is blocked.
Many attempts have been made to produce polymers with higher oxygen permeabilities than PTMSP, but these attempts have been unsuccessful so far.
The use of polyacetylenes including PTMSP to make contact lenses having higher oxygen permeability than current materials would be desirable, however, contact lenses from polyacetylenes are not known.
Conventional methods to produce RGP contact lenses do not work for polyacetylenes.
Polyacetylenes do not lend themselves to these techniques to form contact lenses.
Also, polyacetylenes are very hydrophobic and unsuitable for contact lens use directly.
This technique cannot be used with polyacetylenes.

Method used

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  • Highly oxygen permeable rigid contact lenses from polyacetylenes
  • Highly oxygen permeable rigid contact lenses from polyacetylenes
  • Highly oxygen permeable rigid contact lenses from polyacetylenes

Examples

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Embodiment Construction

[0024]The invention may be further understood by the following non-limiting examples.

[0025]Three methods that can be used to prepare rigid oxygen permeable contact lenses from polyacetylenes, including PTMSP are described.

[0026]A first method to form high oxygen permeability lenses is rotational or spin casting. Spin casting can be used to cast polyacetylene lenses from concentrated solutions of the polymer in a volatile solvent. Exemplary solvents are toluene, benzene or hexane. Other solvents may be used, as easily determined by one of ordinary skill in the art without undue experimentation. The concentration of the polymer in solution may vary, depending on the process, as known in the art. Some suitable concentrations of polymer in solution are from 1 to 20% by weight and all individual values and intermediate ranges therein. Other examples of useful polymer concentrations are between about 3 to about 7% by weight and about 5% by weight. If the concentration of the polymer in th...

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Abstract

Provided are rigid contact lenses having high oxygen permeability and methods to make the same. The rigid contact lenses comprise a polyacetylene. Also provided are methods of making rigid high oxygen permeability contact lenses.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority from U.S. provisional application Ser. No. 60 / 722,740, filed Sep. 30, 2005, the disclosure of which is hereby incorporated by reference to the extent not inconsistent with the disclosure herein.BACKGROUND OF THE INVENTION[0002]This invention relates to contact lenses, in particular, to contact lenses having high oxygen permeability. The cornea is avascular, so the oxygen required for eye health must be transmitted from the atmosphere. If contact lenses are worn, the atmospheric oxygen transfer is blocked. Therefore, contact lenses must be oxygen permeable enough to transmit sufficient oxygen to the cornea. If sufficient oxygen is not transmitted to the cornea, comfort and eye health are affected. The highest oxygen permeability of rigid gas permeable (RGP) contact lenses is currently around 100 barrers. A RGP contact lens having higher oxygen permeability is desired.[0003]Poly(trimethylsilylpropyne), PTMSP...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08G63/48C08F8/00C08F30/08C08F38/00C08F12/02
CPCC08F38/02C08F230/08G02B1/043C08L49/00C08F230/085
Inventor HOFFMAN, WILLIAM C.
Owner THE LAGADO CORP
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